Until you decide to show us what you have, we're not going to solve this.

You may have selected a transparency map for the wrong figure, and so it doesn't fit in the place where the lashes are in the figure's UV map. 

You have have set the transparency amount to a strange number.

You may have connected it to only one of the two inputs.

When I say you, I also mean plural you, like whoever you got it from may have screwed up.

If you're using freebies, there is a good chance the author doesn't know what they're doing, either.

It's 4th of July here and I'm going on the sailboat for the next 36 hours - I hope somebody can help you sort this out, after you post some data about what you have there.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)